Key On Engine Running (KOER) On-Demand Self Test

Connect the NGS Tester to the DLC under the dash. Turn off accessories. Turn A/C off. If vehicle is equipped with an auxiliary powertrain control (rpm control), it must be turned off to perform self tests.

Note: Engine will run rough during this test.

- Perform the necessary vehicle preparation and visual inspection. Refer to Quick Test Operation. Quick Test Operation

- Start engine.

- SELECT CORRECT VEHICLE, YEAR and MODEL.

- Select DIAGNOSTIC DATA LINK.

- Select PCM - POWERTRAIN CONTROL MODULE.

- Select DIAGNOSTIC TEST MODE.

- Select KOER ON DEMAND SELF TEST.

- Follow operating instructions from the menu.

- Record DTCs and follow appropriate pinpoint test.

After test, cycle key to off before running other tests or driving vehicle.